.tab {
    .nav {
        height: 50px;
        border-bottom: 1px solid #000;

        .nav-item {
            float: left;
            width: 33.33%;
            height: 100%;
            text-align: center;
            line-height: 50px;
            &.current {
                background-color: #000;
                color: #FFF;
            }
        }
    }
}